I actually got that advise from several reputable farriers and veterinarians. The bleach is for thrush and motor oil is for cracked heels. I have used the bleach a few times on thrush and it works great. As for the motor oil, Im not sure on that. I have complete trust in everyone of the people I talked to for a response. =) To each his own.
Well I don't own any motor oil so I wont be trying that. I've heard of bleech but I have a hard enough time keeping the purple thrushbuster off myself.